Finding the Third Proportional to 190,269 and 405,870.75

Step by Step Solution

1. Step 1: Write the proportion equation
   190,269 : 405,870.75 = 405,870.75 : x
2. Step 2: Convert to fraction form
   190,269/405,870.75 = 405,870.75/x
3. Step 3: Cross multiply
   190,269x = 405,870.75 × 405,870.75
4. Step 4: Simplify right side
   190,269x = 164,731,065,705.56
5. Step 5: Solve for x
   x = 164,731,065,705.56/190,269
6. Step 6: Final answer
   x = 865,779.85